5181418685 has 4 divisors (see below), whose sum is σ = 6217702428. Its totient is φ = 4145134944.

The previous prime is 5181418657. The next prime is 5181418699. The reversal of 5181418685 is 5868141815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3740912569 + 1440506116 = 61163^2 + 37954^2 .

It is a cyclic number.

It is not a de Polignac number, because 5181418685 - 2¹⁴ = 5181402301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518141864 + ... + 518141873.

It is an arithmetic number, because the mean of its divisors is an integer number (1554425607).

Almost surely, 2^5181418685 is an apocalyptic number.

It is an amenable number.

5181418685 is a deficient number, since it is larger than the sum of its proper divisors (1036283743).

5181418685 is a wasteful number, since it uses less digits than its factorization.

5181418685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036283742.

The product of its digits is 307200, while the sum is 47.

The square root of 5181418685 is about 71982.0719693453. The cubic root of 5181418685 is about 1730.4121758391.

The spelling of 5181418685 in words is "five billion, one hundred eighty-one million, four hundred eighteen thousand, six hundred eighty-five".